Mainboard KX550
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Appendix II: RAID Setup
Introduction to RAID
RAID (Redundant Array of Independent Disks) technology is a sophisticated disk management
system that manages multiple disk drives. It enhances I/O performance and provides
redundancy in order to prevent the loss of data in case of individual disk failure. The RAID
facility on this board provides RAID 0, RAID 1, RAID 0+1, RAID JBOD, and RAID 5.
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isk Striping (RAID 0)
Striping is a performance-oriented, non-redundant disk storage technology. With RAID striping,
multiple disks are used to form a larger virtual disk. Data is then striped or mapped across all
the physical disks. In this way, multiple I/O operations can be executed in parallel, enhancing
performance. Striping does not provide fault tolerance. The minimum number of hard drives for
RAID 0 is 2.
isk Mirroring (RAID 1)
With Disk Mirroring there are redundant disks that mirror the primary disks. Data that is written
to the primary disks are also written to the redundant disks. This redundancy provides fault
tolerant protection from a single disk failure. If a read/write failure occurs on one drive, the
system can still read and write data using the other drive. The minimum number of drives for a
RAID 1 configuration is 2. You are required to use an even number of drives.
isk Striped Mirroring (RAID 0+1)
This mode combines both the performance benefits of RAID 0 with the fault tolerance of RAID 1.
The minimum number of drives for RAID 0+1 configuration is 4 drives. This configuration also
requires an even number of drives.
Note: All mirrored configurations or striped/mirrored configurations should use drives of the
same size.
